【摘要】 以聚乙烯醇为载体,用不同的交联剂环氧氯丙烷与甲醛将聚乙烯醇交联成膜,再固定刚果红,制备了2种可用于光导纤维pH传感器的敏感膜(PECM和PFCM)。线性响应范围分别为 2mol/L[H+ ] ~pH6 8和pH2 9~5 4。2种膜在溶液pH值变化相差 1和 2个pH单位时,在 10s内达到响应平衡。分析结果表明,此2种膜均有较好的响应重现性与可逆性。更多还原

【Abstract】 Two kinds of photo chemical pH sensing membranes PECM and PFCM, for optic pH sen sors, with epichlorohydrin cross-linked PVA and formaldehyde cross-linked PVA gel as matrices are described. Their pH linear response ranges are within 2 mol/ L \~pH 6.8 and pH 2.9~pH 5.4, respectively. The response time of both the membranes is less than 10 s when ΔpH is within 2 pH units. Experim ental results show they have good reproducibility and reversibility.更多还原